Use of the regular expression (question mark)

Source: Internet
Author: User

Now let's match an HTML tag, matching table as follows:

<table.*?>[\s\S]*<\/table>
Or
<table.*?>[\s\S]*?<\/table>

Above two expressions, one adds "?" And one without "?", then what's the difference?
We know "?" In a regular expression is a wildcard character: matches the preceding subexpression 0 or one time, or indicates a non-greedy qualifier.

Here, passing the test, we come to the conclusion that we do not add "?" , in the case of matching the following paragraph of content:

<table> This is the first table</table>
I'm not the content in the table.
<table> This is a second table</table>.
I'm not the content in the table.
<table> This is a third table</table>.

Will match the end of the <table> start,</table>,


Add the "?" After that, only the nth matched content is matched,


PS. When using regular matching HTML tags, be careful to use a question mark to match

Use of the regular expression (question mark)

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